A terminal with overload protection

Abstract

The utility model discloses a kind of wiring terminals with overload protection function, static sheet conductive sheet and moving piece conductive sheet are arranged at intervals, one end of static sheet conductive sheet is connected with wiring assembly, the other end is located inside shell and is equipped with static conductive contact point;One end of moving piece conductive sheet extends to the outside of shell by passing through shell, and the other end is connected with overload protection part;Overload protection part is equipped with corresponding dynamic conductive contact point with static conductive contact point, when the current through wiring terminal exceeds the set current threshold, overload protection part drives dynamic conductive contact point to move in the direction of away from static conductive contact point.The wiring terminal of the utility model integrates overload protection function, without additional preparation overload protection device, circuit protection can be realized.At the same time of simplifying installation procedure, the wiring demand of traditional external overload protection device is saved, compact structure, small space occupation, convenient in various electrical equipment installation and arrangement.

Description

Technical Field

[0001] This utility model relates to the field of terminal block technology, and in particular to a terminal block with overload protection function, which is used to realize reliable connection of electrical circuits and provide overload protection function. Background Technology

[0002] Terminal blocks are commonly used components in electrical connections and are widely used in various electrical equipment and circuits. In actual use, electrical circuits may experience overload; excessive current can cause the terminal blocks to overheat, and may even lead to fires or other safety accidents.

[0003] Although there are some overload protection devices on the market, most of them are separate from the terminal blocks, requiring additional installation space and wiring, which increases installation costs and system complexity. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of the prior art by providing a terminal block with overload protection.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] A terminal block with overload protection includes a housing and a wiring assembly disposed on the housing. It also includes a stationary conductive plate, a moving conductive plate, and an overload protection element disposed within the housing. The stationary and moving conductive plates are spaced apart. One end of the stationary conductive plate is connected to the wiring assembly, and the other end is located inside the housing and has a stationary conductive contact. One end of the moving conductive plate extends through the housing to the outside of the housing, and the other end is connected to the overload protection element. The overload protection element has a moving conductive contact corresponding to the stationary conductive contact. When the current through the terminal block exceeds a set current threshold, the overload protection element causes the moving conductive contact to move away from the stationary conductive contact.

[0007] A further technical solution is that the housing includes an upper shell and a lower shell that interlock with each other.

[0008] A further technical solution is that the upper shell has multiple terminal wells, and the wiring assembly includes multiple wiring pull tabs, which are disposed in the terminal wells.

[0009] A further technical solution is that the upper shell is provided with a first platform, a second platform, and a horizontal clamping groove. The stationary conductive sheet includes a first stationary conductive sheet, a second stationary conductive sheet, and a stationary conductive connecting sheet connecting the first and second stationary conductive sheets, which are arranged in parallel and offset positions. The first stationary conductive sheet is located on one side of the first platform and inserted into one of the wiring pull buckles. The second stationary conductive sheet is located on the other side of the first platform, and the stationary conductive contact is located on the second stationary conductive sheet. Limiting surfaces that contact the second stationary conductive sheet are provided on both sides of the first platform inside the upper shell. The stationary conductive connecting sheet abuts against the lower shell. The movable conductive sheet includes a first movable conductive sheet, a second movable conductive sheet, and a movable conductive connecting sheet connecting the first and second movable conductive sheets. The first movable conductive sheet is located on the second platform and abuts against the upper shell and the lower shell respectively. The movable conductive connecting sheet is located in the vertical clamping groove formed by the second platform and the side wall of the upper shell. The second movable conductive sheet passes through the horizontal clamping groove and its tail end extends outward to the outside of the upper shell.

[0010] A further technical solution is that the overload protection component is installed on the first moving conductive sheet.

[0011] A further technical solution includes a reset component, which is movably mounted on the housing and located on the side of the overload protection component away from the stationary conductive sheet.

[0012] A further technical solution is that the reset component includes a reset component body, a limiting ring is provided in the middle of the reset component body, a reset guide groove is provided on the housing, the limiting ring slides in the reset guide groove, one end of the reset component body extends out of the housing, and the other end extends toward the overload protection component.

[0013] A further technical solution is that the static conductive contact and the dynamic conductive contact are made of a highly conductive and wear-resistant metal material.

[0014] A further technical solution is that the overload protection component is a thermally sensitive bimetallic strip.

[0015] A further technical solution is that the housing is provided with plug-in posts.

[0016] The beneficial effects of adopting the above technical solution are as follows:

[0017] This utility model integrates overload protection into its terminal block, eliminating the need for an additional overload protection device to protect the circuit. When the current through the terminal block is normal, the overload protection component remains in its original state, ensuring good contact between the moving and stationary conductive plates through the conductive contacts, thus maintaining normal circuit continuity. When the current exceeds a set current threshold, the overload protection component bends and deforms due to heat, causing the moving and stationary conductive contacts to separate, cutting off the circuit and achieving overload protection. This effectively prevents equipment damage and safety hazards caused by electrical circuit overload. The integrated design simplifies installation and eliminates the wiring requirements of traditional external overload protection devices. Its compact structure and small footprint make it easy to install and arrange in various electrical equipment.

[0018] The overload protection device can be reset simply by pressing the reset button, which is convenient and quick. The wiring pull tab design makes wire connection simpler and more efficient, eliminating the need for complicated tools and procedures, thus improving installation and maintenance efficiency. Attached Figure Description

[0019] Figure 1 This is an exploded view of this utility model;

[0020] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of another aspect of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the stationary conductive sheet;

[0023] Figure 5 This is a schematic diagram of the structure of the moving conductive sheet;

[0024] Figure 6 This is a schematic diagram of the upper shell structure;

[0025] Figure 7 This is a schematic diagram of the reset component;

[0026] Figure 8 This is a schematic diagram of the wiring terminal of this utility model in an overload protection state;

[0027] Figure 9 This is a schematic diagram of the wiring terminal of this utility model in normal working condition.

[0028] In the diagram: 1. Static conductive sheet; 11. Static conductive contact; 12. First static conductive sheet; 13. Second static conductive sheet;

[0029] 14. Static conductive connecting piece; 2. Moving conductive piece; 21. First moving conductive piece; 22. Second moving conductive piece; 23. Moving conductive connecting piece; 3. Overload protection component; 31. Moving conductive contact; 4. Reset component; 41. Reset component body; 42. Limiting ring; 5. Reset guide groove; 6. Wiring assembly; 7. Upper shell; 71. First platform; 72. Second platform; 73. Horizontal clamping groove; 74. Limiting surface; 75. Vertical clamping groove; 76. Insertion post; 8. Lower shell; 9. Terminal well. Detailed Implementation

[0030] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] like Figure 1-3 As shown, a terminal block with overload protection function is disclosed, including a housing, a wiring assembly 6 disposed on the housing, and a stationary conductive plate 1, a moving conductive plate 2, and an overload protection element 3 disposed inside the housing. The stationary conductive plate 1 and the moving conductive plate 2 are spaced apart. One end of the stationary conductive plate 1 is connected to the wiring assembly, and the other end is located inside the housing and is provided with a stationary conductive contact 11. One end of the moving conductive plate 2 extends through the housing to the outside of the housing, and the other end is connected to the overload protection element 3. The overload protection element 3 is provided with a moving conductive contact 31 corresponding to the stationary conductive contact 11. When the current through the terminal block exceeds a set current threshold, the overload protection element 3 drives the moving conductive contact 31 to move away from the stationary conductive contact 11.

[0033] In another embodiment, the housing consists of an upper shell 7 and a lower shell 8 that interlock with each other.

[0034] The upper shell 7 has multiple terminal wells 9, and the wiring assembly 6 includes multiple wiring clips disposed within the terminal wells 9. The wiring clips are used for quick connection and fixation of wires, and are characterized by easy operation and secure connection. The wiring clips can quickly clamp the wires into the terminals, achieving a reliable electrical connection.

[0035] In another embodiment, such as Figure 4-9 As shown, the upper shell 7 is provided with a first platform 71, a second platform 72, and a horizontal clamping groove 73. The stationary conductive sheet 1 includes a first stationary conductive sheet 12 and a second stationary conductive sheet 13 arranged in parallel and offset positions, and a stationary conductive connecting piece 14 connecting the first stationary conductive sheet 12 and the second stationary conductive sheet 13. The first stationary conductive sheet 12 is located on one side of the first platform 71 and inserted into one of the wiring pull clips. The second stationary conductive sheet 13 is located on the other side of the first platform 71, and the stationary conductive contact 11 is located on the second stationary conductive sheet 13. The upper shell 7 has limiting surfaces 74 on both sides of the first platform 71 that contact the second stationary conductive sheet 13. The stationary conductive connecting piece 14 abuts against the lower shell 8. The stationary conductive sheet 1 is fixed by the cooperation of the first platform 71, the limiting surfaces 74, and the shells of the upper shell 7 and the lower shell 8, eliminating the need for fixing with screws or the like, simplifying the installation steps and improving installation efficiency. The movable conductive sheet 2 includes a first movable conductive sheet 21, a second movable conductive sheet 22, and a movable conductive connecting sheet 23 connecting the first movable conductive sheet 21 and the second movable conductive sheet 22. The first movable conductive sheet 21 is located on the second platform 72 and abuts against the upper shell 7 and the lower shell 8 respectively. The movable conductive connecting sheet 23 is located in the vertical clamping groove 75 formed by the second platform 72 and the side wall of the upper shell 7. The second movable conductive sheet 22 passes through the horizontal clamping groove 73 and extends outward to the outside of the upper shell 7. The movable conductive sheet 2 is fixed by the cooperation of the second platform 72, the vertical clamping groove 75, the horizontal clamping groove 73, and the shells of the upper shell 7 and the lower shell 8, eliminating the need for fixing with screws or the like, simplifying the installation steps and improving installation efficiency. The overload protection component 3 is installed on the first movable conductive sheet 21.

[0036] In another embodiment, the terminal block further includes a reset member 4, which is movably mounted on the housing and located on the side of the overload protection member 3 away from the stationary conductive plate 1, facilitating operation. The reset member 4 is made of a material with excellent insulation properties and an anti-slip textured surface to improve operational safety and convenience. When the operator presses the reset member 4, it moves towards the overload protection member 3 until it comes into contact with it, and continues to push the overload protection member 3, causing the moving conductive contact 31 to re-engage with the stationary conductive contact 11, restoring power supply.

[0037] Specifically, such as Figure 7 As shown, the reset component 4 includes a reset component body 41, a limiting ring 42 is provided in the middle of the reset component body 41, a reset guide groove 5 is provided on the housing, the limiting ring 42 slides in the reset guide groove 5, one end of the reset component body 41 extends out of the housing, and the other end extends toward the overload protection component 3.

[0038] Preferably, the static conductive contact 11 and the dynamic conductive contact 31 are made of a highly conductive and wear-resistant metal material, such as a silver alloy. This ensures a good electrical connection when the circuit is conducting and reliably disconnects the circuit when the overload protection trips.

[0039] The overload protection component 3 is a thermally sensitive bimetallic strip, made of two metal materials with significantly different coefficients of thermal expansion bonded together. When the current through the terminals is normal, the overload protection component remains in its original shape, ensuring good contact between the moving and stationary conductive plates through the conductive contacts, allowing the circuit to conduct normally. When the current exceeds the set current threshold, the overload protection component bends and deforms due to heat, causing the moving and stationary conductive contacts to separate, cutting off the circuit and achieving overload protection.

[0040] The housing is also provided with a plug post 76, the cross section of which is a star-shaped structure, for plugging in the wiring terminal to fix the wiring terminal and prevent the wiring terminal from shaking.

[0041] Working principle:

[0042] Normal working status: such as Figure 9 As shown, when the electrical system is operating normally, current flows through the terminals, and the overload protection component 3 remains unheated and in its initial state. This ensures good contact between the moving and stationary conductive plates through the conductive contacts, allowing the circuit to conduct normally and the current to be transmitted stably.

[0043] Overload protection process: such as Figure 8 As shown, when an overload occurs in the circuit and the current exceeds the set threshold, the overload protection component 3 heats up due to the heat generated by the current. Because the two metals have different coefficients of thermal expansion, the overload protection component 3 bends and deforms. This causes the moving conductive contact to separate from the stationary conductive contact, cutting off the circuit and achieving overload protection. This effectively prevents equipment damage and safety hazards caused by electrical circuit overload.

[0044] Troubleshooting and Reset: After troubleshooting and resolving the fault causing the overload, the operator presses the reset button 4. The reset button 4 moves towards the overload protection device 3 until it comes into contact with the overload protection device 3, and continues to push the overload protection device 3 to move, so that the moving conductive contact 31 re-engages with the stationary conductive contact 11, restoring power supply.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A terminal block with overload protection function, comprising a housing and a wiring assembly (6) disposed on the housing, characterized in that: It also includes a stationary conductive sheet (1), a moving conductive sheet (2), and an overload protection component (3) disposed within the housing. The stationary conductive sheet (1) and the moving conductive sheet (2) are spaced apart. One end of the stationary conductive sheet (1) is connected to the wiring assembly, and the other end is located inside the housing and is provided with a stationary conductive contact (11). One end of the moving conductive sheet (2) extends through the housing to the outside of the housing, and the other end is connected to the overload protection component (3). The overload protection component (3) is provided with a moving conductive contact (31) corresponding to the stationary conductive contact (11). When the current through the terminal exceeds the set current threshold, the overload protection component (3) drives the moving conductive contact (31) to move away from the stationary conductive contact (11); the housing includes an upper shell (7) and a lower shell (8) that are interlocked. The upper shell (7) is provided with a first platform (71), a second platform (72) and a horizontal clamping groove (73). The stationary conductive sheet (1) includes a first stationary conductive sheet (12) and a second stationary conductive sheet (13) that are arranged in parallel and offset manner, and a connection between the first stationary conductive sheet (12) and the second stationary conductive sheet. (13) The static conductive connecting piece (14), the first static conductive piece (12) is located on one side of the first platform (71) and inserted into one of the wiring pull buckles, the second static conductive piece (13) is located on the other side of the first platform (71), and the static conductive contact (11) is located on the second static conductive piece (13), the upper shell (7) has limiting surfaces (74) on both sides of the first platform (71) that contact the second static conductive piece (13), the static conductive connecting piece (14) abuts against the lower shell (8), and the moving conductive piece (2) is wrapped Includes a first movable conductive sheet (21), a second movable conductive sheet (22), and a movable conductive connecting piece (23) connecting the first movable conductive sheet (21) and the second movable conductive sheet (22). The first movable conductive sheet (21) is located on the second platform (72) and abuts against the upper shell (7) and the lower shell (8) respectively. The movable conductive connecting piece (23) is located in the vertical clamping groove (75) formed by the second platform (72) and the side wall of the upper shell (7). The second movable conductive sheet (22) passes through the horizontal clamping groove (73) and extends outward to the outside of the upper shell (7).

2. A terminal block with overload protection function according to claim 1, characterized in that: The upper shell (7) has multiple terminal wells (9), and the wiring assembly (6) includes multiple wiring pulls, which are disposed in the terminal wells (9).

3. A terminal block with overload protection function according to claim 1, characterized in that: The overload protection component (3) is installed on the first moving conductive sheet (21).

4. A terminal block with overload protection function according to claim 1, characterized in that: It also includes a reset member (4), which is movably mounted on the housing and located on the side of the overload protection member (3) away from the stationary conductive sheet (1).

5. A terminal block with overload protection function according to claim 4, characterized in that: The reset component (4) includes a reset component body (41), a limiting ring (42) is provided in the middle of the reset component body (41), a reset guide groove (5) is provided on the housing, the limiting ring (42) slides in the reset guide groove (5), one end of the reset component body (41) extends out of the housing, and the other end extends toward the overload protection component (3).

6. A terminal block with overload protection function according to claim 1, characterized in that: The static conductive contact (11) and the dynamic conductive contact (31) are made of highly conductive and wear-resistant metal materials.

7. A terminal block with overload protection function according to claim 1, characterized in that: The overload protection component (3) is a thermal bimetallic strip.

8. A terminal block with overload protection function according to claim 1, characterized in that: The housing is provided with a plug-in post (76).

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